Yeah... It is a common issue for now. Since revision 5.0-619 (the CoreTiming cleanup) using Gecko Codes causes Dolphin to run the Interpreter64 mode (which is drastically slower) instead of the JIT64 Recompiler mode you are used too. You should use a version earlier than 5.0-619 or disable Gecko Codes in the current version. It affects every game when using Gecko Codes, so it is not exclusive to VC N64 games. For now, I am using revision 5.0-613 which still works correctly (5.0-615 works too). There is a fix in the works, but that might take a while. So hopefully when you check back in a few day, this issue has been fixed. As far as I am aware, using AR Codes still work normally.
That is the nature of having development builds, regressions can happen. Stable builds (Dolphin 5.0) are as implied tested for maximum stability, so you could always use Dolphin 5.0 if you are afraid to encounter issues. Just be aware of the fact that the latest development builds might have an issue sometimes. I did not update Dolphin yet since I am relying on save states for a while to port textures in HD. I usually update Dolphin when I am ready to port the next major area. So I have not seen the error myself yet. For now, I keep my version at 5.0-613 since I use Gecko Codes for quite a few games in my library to improve the overall quality.
Check out this PR for the upcoming fix: https://github.com/dolphin-emu/dolphin/pull/4216.
That is the nature of having development builds, regressions can happen. Stable builds (Dolphin 5.0) are as implied tested for maximum stability, so you could always use Dolphin 5.0 if you are afraid to encounter issues. Just be aware of the fact that the latest development builds might have an issue sometimes. I did not update Dolphin yet since I am relying on save states for a while to port textures in HD. I usually update Dolphin when I am ready to port the next major area. So I have not seen the error myself yet. For now, I keep my version at 5.0-613 since I use Gecko Codes for quite a few games in my library to improve the overall quality.
Check out this PR for the upcoming fix: https://github.com/dolphin-emu/dolphin/pull/4216.